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- birds1
- climate change1
- contamination and pollution1
- culture and demographics3
- elevation5
- fish2
- habitat33
- hazards1
- human impacts4
- imagery + basemaps35
- land use and land cover4
- monitoring stations3
- natural resources27
- physical processes1
- plants11
- population and community ecology1
- recreation2
- restoration14
- sea level2
- sediment2